Self-threading shuttle



. Nov. 24, 1925- 63,

H. L. BONNEY SELF THREADING SHUTTLE Filed NOV- 1925' Patented Nov. 24,i925.

UNITED STATES HENRY L. BONNEY, F NORTH ANDGVER,

MASSACHUSETTS,- ASSIG-NQR OF ONE-HALF TO GEORGE GIBSON BROWN, 0FLAVIRENCE, MASSACHUSETTS.

SELF-Tl-IREADING SHUTTLE.

Application filed November To all whom it may concern Be it known that1, Emmy L. Bonner, a citizen of the United States, a resident of NorthAndover, in the county 01'' Essex and State of hlassachusetts, haveinvented an Improvement in Self-Threading Shuttles, of which thefollowing is a specification.

This invention relates to that class of shuttles employed in automaticlooms which are threaded automatically when the bobbin is inserted, thethreading action being partly performed on the first pick and finishedon the second.

in shuttles of this character, .it is not only necessary that on thefirst pick the thread shall be drawn into the threading slot into such aposition that the threading operation will be completed on the secondpick, but it is also usually necessary to provide means to retain thethread in the threading slot in such a position, during the time inwhich the shuttle is in the shuttle box between the first and secondpick, that the operation will be completed.

Unthreading at the end of the first pick, or beginning of the second, isprincipally due to the kinking of hard twisted thread when is becomesslack at the end of the' flight 0f the shuttle, and in case it should 3pass back around the thread retaining means, the shuttle will becomecompletely unthreaded as it passes from the shuttle box, at thebeginning of the second pick.

tine of the objects of my invention is to provide an automaticallythreading shuttle in which the drawing of the thread into the threadingslot past the thread retaining beak, whichis usually employed, will beinsured by the straight pull on the thread due to the action of thefirst pick, and in which the possibility of unthreading by the kinkingor thrashing about of the thread, after it has been drawn past the beakat the end of the first pick, will be obviated.

in shuttlesoit' this cl'laracter, it has been the usual practice tolocate the tension device in the throat of the shuttle, or at the pointwhere the thread leaves the bobbin chamber, the most common form oftension device in use being a piece of felt over which the thread isdrawn. An objection to this arrangement is that the thread. is likely toballoon or swing about the center line of the bobbin asan axis, as it isdrawn from the bobbin and a result the tension 6, 1923. Serial No.873,683.

action of the felt, when located in the position above described, isvariable, or too great at sometimes and too small at others.

A further object of my invention is to provide a tension device which isso located and arranged that its action will not be affected by, theballooning of the thread, so that a practically constant tension will bemaintained on the thread at all times, and in this connection, anotherobject of the invention is to provide an improved means or manner ofsecuring the tensioning means in position, so that the expense ofmanufacture may be reduced.

I accomplish these objects by means of the construction hereinafterdescribed and shown in the accompanying drawings, in which:

Fig. 1 is a top plan view of the thread delivery end portion of a selfthreading shuttle embodying my invention.

Fig. 2 is a central longitudinal vertical section thereof on line aa ofFig. 1.

Fig. 3 is a horizontal section on line 6 Z- of Fig. 2.

Fig. 4: is a similar vlew at line 0 c of Fig. 2.

Fig. 5 is a perspective view of the thread delivery end of the shuttle.

Figs. 6 and 7 are, respectively a side elevation, partly in section, anda bottom plan view of the threadingblock.

As shown in the drawing, the shuttle body 2 is provided with acylindrical throat or )assage which is in central longitudinal alignmentwith the longitudinal center line of the bobbin 3, said passage beingflared at its outer end. The wood of the shuttle has a longitudinal slot4 which leads to said passage, the sides of the slot being oppositelybeveled at their upper ends to form inclined faces 5 and 6 to guide thethread. into the slot as it is drawn forwardly. The Wood of the shuttleis also recessed from its upper side to receive the metal threadingblock, which comprises a somewhat circularly shaped shank 7, having anoutwardly flaring or inverted trunco-conical shaped head portion 8 fromone side of which the beak 9 projects horizontally the edges 10 and 1101 said beak being tangentially arranged with relation to the circularupper edge of the head portion and converging to its end. The edge 10 ofthe beak extends approximately parallel to, but in ll) ing a new pieceinto therecess times, so that a suitable drag or tension will beconstantly placed on the thread, which will in no way be affected by theballooning or thrashing of the thread. When the threader block is inposition, the felt 23 will be securely held against displacement, butwhen it becomes necessary to renew the felt, this may be readily done byremoving the block, picking out the old piece and pushbehind the post Qthe latter thus serving as a retaining means for the felt, as well as athread guide. in practice the post 21 will be of porcelain if theshuttle is used for worsted and of metal if it is used for cotton.

The above described construction is less expensive to manufacture thanmany shuttles of this general type, as the threader block is a simplecasting and the chamber which receives it may be largely made by boring.

I claim:

1. A self-threading shuttle having a slot ted side-delivery eye and athread passage leading longitudinally from the bobbin chamber andtransversely to said eye, a threading block disposed in the rear of thetransverse portion of the passage and comprising an upright shank havinga horizontally projecting beak at its upper end, a thread guide postmounted in the lower end of said shank at the vertex of the anglebetween said passage portions to cause the thread to be drawn againstsaid post as it is drawn to said eye, said shank being recessed in therear of the thread ei'igaged portion of the post and having threadtensioning material inserted therein and erq 'ending into the line ofthe thread as it is drawn about the post to engage the thread before andafter it is drawn past the same and cause a drag on thereon at eachpoint of en gagcni on t.

A self-ti)reading shuttle having a sidedolivcry eye and a th readpassage extending lmigitiuliimlly thereof from the bobbin chamber andtransversely to said eye, a threading block having a vertically disposedshank mounted in the shuttle in the rear of the transverse portion ofsaid passage and having a socket extending upwardly therein from itslower end, a thread guide post mounted in said socket at the vertex ofthe angle of said passage in position to cause the thread to be drawnagainst the same as it is drawn from the eye, said post extending to thelower end of said shank and said shank being recessed in the rear of thelower portion of said post and having a tension felt held in said recessby said post and arranged to project at each side thereof in position tocause the thread to be drawn against each projecting portion of thefelt, as it is drawn against the post.

3. A self-threading shuttle having a sidedelivery eye and a threadpassage leading longitudinally from the bobbin chamber and transverselyto said eye, a threading block mounted in the shuttle in the rear of thetransverse portion of said passage, a vertical thread-guide post mountedat its upper end in said block and depending to the bottom of saidpassage at the vertex of the angle therein in position to cause thethread to be drawn thereagainst as it is drawn to the shuttle eye, saidblock being recessed in the rear of the thread guiding portion of saidpost and having a tension felt held therein in position to project ateach side of the post into engagement with the thread as it is drawnagainst the post in its passage to the eye.

t. A self-threading shuttle having a side delivery eye, a threader blockchamber and a thread passage leading longitudinally thereto andtransversely therefrom to said eye, a th reader block comprising anupright shank having a horizontally projecting beak and means forsecuring the same in said chamber with the lower end of its shankengaged with the bottom thereof, said shank having a recess in its frontside extending upward from its lower end and a socket therein extendingupward from the bottom of said recess, a thread guide post mounted insaid socket and extending into engagement with the bottom of saidchamher in position to cause the thread to be drawn against the same andbent sharply as it is drawn to the shuttle eye, and a tension feltinserted in said recess about the post and clam pcd between the same andthe sides and bottom. of the recess and the bottom of the thread blockchamber, said felt being :n'ranged to project beyond the sides of theshank into positions in which the thread will be drawn thereagainst atboth sides of the post as it is drawn against the post.

in testimony whereof, I have signed my name to this specification.

HENRY L. BONNEY.

III

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